/Engine/Source/Editor/Kismet/Public/BlueprintDragDropMenuItem.h
This class represents those "consolidated" actions, and essentially serves as aFDragDropOperationspawner. It wraps a singleUBlueprintNodeSpawner(any one of the set that it is supposed to represent), that it uses to determine the properFDragDropOperation.
struct FBlueprintDragDropMenuItem : public [FEdGraphSchemaAction](API\Runtime\Engine\EdGraph\FEdGraphSchemaAction)